Ans:- The ATP Rankings, as defined by the Association of Tennis Professionals (ATP), are the "objective merit-based method used for determining qualification for entry and seeding in all tournaments for both (male) singles and doubles, except as modified for the ATP World Tour Finals (singles or doubles)."

KNOCKOUT TOURNAMENTS

Most of the tennis tournaments played are knockout tournaments. There are 128players in the most

important knockout tournaments, but smaller tournaments have fewer players.

In the first round, all 128 players play, so 64matches are played in total. This is called the ‘round of 128’. The

64 losers are knocked out, and the64 winners advance to the next round, called the ‘round of64’. In this round